Where can I get a UOA how much are they? What I would like to do is compare the Motorcraft 5W-20(factory fill) currently in my truck to Mobil 1 0W-20(I am going to change to) and run for 4500-5000 miles or 6 months. I want to see if its worth it to change oils for my truck with my driving habits. Am I on the right track or is this a dumb idea? My truck is an 03 Ford Lightning with a 5.4L Super Charged.